Ethan allen



UNITED STATEs 'PATENT OFFICE.

ETHAN ALLEN, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF TO DAVII)h W.CASE, OF SAME PLACE.

CAR-BRAK E.

SPECIFICATION forming part of Letters Patent No. 531,287, dated December18, 1894.

Application led December 26, 1893- Serial No. 494,640- (No model.)

To all whom it may concern,.-

Be it known that I, ETHAN ALLEN, of the city of St. Louis, in the Stateof Missouri, have invented a certain new and useful Improvement inCar-Brakes, of which the following is a full, clear, and exactdescription, reference being had tothe accompanying drawings, formingpart of this specification.

My invention relates to a combined hydraulic and electric brake; and myinvention consists in features of novelty hereinafter fully describedand pointed out in the claims'.

Figure I is a side elevation, illustrative of my invention. Fig. II isan enlarged section through the brake cylinder, showing the pistons inelevation. Fig. III is an enlarged, longitudinal section, through themagnet and core. Fig. IV isan enlarged, longitudinal section through thehydraulic cylinder.

Referring to the drawings, 1 represents the wheelsv of a street or otherrailway car.

2 represents the shoes of the brake mechanism, and which may besupported in the usual way. The mechanism of each brake shoe isconnected by a rod 3, to a piston 4 located in a brake cylinder 5, whichis supported from the bottom of the car by means of a bracket 6, or'itmay be otherwise supported. Pressure is imparted to the pistons 4 toapply the brakes by means of liquid entering between the pistons througha pipe 7, and the pistons may be ,moved` inwardly, after the fluidpressure is removed, by means of springs 8. See Fig. II. The pipe 7communicates with a hydraulic cylinder 9, suitably supported from thecar body, or the car truck. Within this cylinder is a piston 10, havinga rod 11.

12 represents a magnet suitably supported from the bottom of the car, orupon the car truck and having a core 13. The piston rod .l1 traversesthe core 13, and is secured to the secured to the under side of the carbody or to the car truck.

The manner of supporting the magnet and the cylinders 5 and 9, as wellas the manner,

of supporting the brake apparatus, forms no part of myinvention; andthese parts may be supported either upon the truck frame or upon the carbody, as thought best.

15 represents a switch for controlling the current to the magnet l2.

The core 13 is hollowed out in the -form of a cone, as shown in Fig.III, so that as it enters the magnet, the 'attraction will increase, askthe greater amount of metal at this end of the core causes it to beattracted with greater force by the magnet, and thus the greatestpressure upon the brake shoes is obtained Vat the desired point. Therewill be a considerable movementot' the core andthe piston 10 in thesmall cylinder 9, as compared with the movement of the pistons 4 in thelarge cylinder 5. The pistons 4 do not have to travel far to apply thebrakes, and the long movement of the piston l0, With the core 13, f

there is little to get out of order, or to require K repairs.

It is evident that itone brake shoe only is to be operated, one piston 4alone may be used in the cylinder 5.

Iclaim as my invention- 1. In a `car brake, the combination of a brakecylinder, a brake shoe, a connection between the brake shoe and thepiston of the cylinder, a hydraulic cylinder, a magnet and a core; thecore of the magnet being connected to the piston of the hydrauliccylinder; substantially as and for the purpose set forth. v 2. In a cai`brake, the combination of the brake shoes, a hydraulic cylinder, apiston working in said cylinder and connected with the brake shoes, andan electric device for imparting movement to the piston of the hydrauliccylinder, said device consisting of a magnet and a core, the said corehaving a tapering cavity, substantially as set forth.

3. In a car brake, the combination of the cylinder; said core having aconical center; rake shoes, a. brake cylinder, a connectirnsubstantially as and for the purpose set; forth.

etWeen the brake shoes and the pistons in t e A brake cylinder, a.hydraulic cylinder, a. pipe ETHAN ALLEN 5 connecting the hydrauliccylinder to the In presence of brake cylinder, a, magnet, and a. corecon- A. M. EBERSOLE, nected to the said piston rod of the hydraulic C.G. EDUARDS.

